css: clean up <ul> css.

* Remove `list-style-type: none` rules (this is the default).
* Add `list-bulleted` and `list-inline` utility classes.
* Wrap terms of service and user deletion pages in dtext `.prose` class
  so we don't have to redefine basic list styles on these pages.

app/views/pools/_inline_list.html.erb

@@ -1,4 +1,4 @@
-<ul class="inline-pool-list">
+<ul class="list-inline">
   <% pools.each do |pool| %>
     <li><%= link_to pool.pretty_name, pool, :class => "pool-category-#{pool.category}" %></li>
   <% end %>